CN201541119U - Transformer neutral point gap earth protective device - Google Patents
Transformer neutral point gap earth protective device Download PDFInfo
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- CN201541119U CN201541119U CN2009201038547U CN200920103854U CN201541119U CN 201541119 U CN201541119 U CN 201541119U CN 2009201038547 U CN2009201038547 U CN 2009201038547U CN 200920103854 U CN200920103854 U CN 200920103854U CN 201541119 U CN201541119 U CN 201541119U
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Abstract
The utility model discloses a transformer neutral point gap earth protective device which is characterized in that: an isolating switch, a lightning arrester, a discharge gap and a current transformer are arranged on a support; two electrodes of the discharge gap are bar-shaped, the ends of each bar-shaped electrode is hemispherical and is made of titanium base platinum, at least one electrode is provided with a gap distance adjusting mechanism, one electrode is arranged on the upper end of the lightning arrester, and the other electrode is arranged on the current transformer, and the ends of the two electrode bars form the straight line-shaped discharge gap by the earthing of the current transformer. The transformer neutral point gap earth protective device has compact and reasonable structure, small volume, time-saving and labor-saving site construction, short construction period, and small occupying area of construction. Gap electric field is uniformly distributed and has small dispersibility and high accuracy, and electrode ends of the discharge gap can be placed outdoors for a long time without corrosion and can not deform under the impact of electric shock, thus having no need of replacement and small amount of maintenance. The discharge gap is arranged in the horizontal direction, so that the phenomena of short circuit of the discharge gap or shortening of the gap, or enlarging of the gap distance can not take place when encountering rain, snow or strong winds.
Description
One, technical field
The utility model relates to a kind of protection equipment for transformer, relates in particular to a kind of 110KV of being used for or 220KV transformer neutral point earth protective device.
Two, background technology
Transformer is in running; when lightning wave immerses transformer station to transformer neutral point and system's single-phase earthing, open-phase operation from circuit; when particularly supervening static exciter inductance and line mutual-ground capacitor resonance; can produce higher lightning overvoltage or power frequency steady-state overvoltage at transformer neutral point; transformer is constituted a threat to; even make insulation breakdown; for preventing that the overvoltage that atmospheric over-voltage, switching overvoltage and transformer high-voltage side single-phase earthing cause from destroying neutral point insulation, need the neutral point protection device.Not special-purpose at present protective device is protected at above-mentioned situation, and conventional way is to purchase isolating switch by the user, lightning arrester and discharging gap, the synthetic cover neutral point protection equipment of fabrication and installation groups of holders at the scene.Its structure is: lightning arrester and isolating switch are installed as one, and transformer neutral point voltage is drawn with angle steel from transformer neutral point isolating switch top, introduce the earth by lightning arrester, discharging gap, current transformer, earth electrode.Its shortcoming is: (1) site tissue is installed, debugging, and workload is big, long construction period.(2) discharging gap is a vertical in form, and when sleety weather, shorten in easy short circuit of discharging gap or gap, causes misoperation.Its structural stability is poor, can swing at wind-force effect bottom electrode, causes clearance distance to become big.And the discharging gap electrode is made by red copper bar is zinc-plated, in permanent outdoor environment, causes the electrode bar surface corrosion; Under the impact of electric shock, clearance surface pit occurs and causes the gap electrical field skewness, and is dispersed big, and poor accuracy is protected not in place.The discharging gap periodic replacement cycle is short, so its maintenance workload is big.(3) isolating switch and lightning arrester are assembled into one, bad identification, and one of them goes wrong, and must change together, wastes time and energy the cost height.(4) isolating switch adopts pulling folding, inconvenient operation.
Three, utility model content
The purpose of this utility model solves the above-mentioned problems in the prior art exactly, provides a kind of scene easy for installation, and the discharging gap electrode is difficult for corrosion; be difficult for short circuit between the electrode; perhaps change distance, structural stability height, the transformer neutral point gap earth protective device that protectiveness is good.
For finishing above-mentioned purpose, technical solution of the present utility model is: a kind of transformer neutral point gap earth protective device, and it comprises isolating switch, lightning arrester, discharging gap, current transformer and support; Isolating switch, lightning arrester, discharging gap summation current transformer are rack-mount; Isolating switch, lightning arrester and discharging gap parallel connection; Two electrodes of discharging gap are clavate, and its termination is a hemisphere, are made by titanium base platinum, and at least one electrode is provided with the clearance distance adjusting mechanism; One of them electrode is installed in the upper end of lightning arrester, and another electrode is installed on the current transformer, and by current transformer ground connection, the discharging gap that the termination of two electrode bars forms is " one " font.
The above-mentioned described isolating switch of the utility model is made up of base, two insulation columns, current-carrying part and operating mechanisms; Two insulation columns are installed on the base, and each insulation column upper end respectively is installed with a conduction plug-in strip, and the contact position of two plug-in strip contacts is positioned at the middle part of two insulation columns; Bearing holder (housing, cover) respectively is equipped with in the lower end of insulation column, and the fixing rotating mechanism in insulation column lower end connects operating mechanism by connecting rod, and under the drive of operating mechanism, the conduction plug-in strip can horizontally rotate 90 °.
The above-mentioned described lightning arrester of the utility model is a porcelain overcoat zero-clearance zinc oxide lightning arrester, is circumscribed with discharge counter.
The above-mentioned described discharge counter of the utility model is a JCQ1-10/600 series discharge counter.
The above-mentioned described current transformer of the utility model is the outdoor dry type current transformer.
The above-mentioned described operating mechanism of the utility model is CS8-5 type manual-operating mechanism or CJ6 type motor-operating mechanism.
The above-mentioned described support of the utility model comprises zinc-plated steel pole, channel-section steel support and mounting bracket; Zinc-plated steel pole is made by hollow steel pole is zinc-plated, is connected to upper and lower two winding floors on it.
Because the utility model has adopted such scheme, it can raise because of the voltage that caused by the lightning impulse or the system failure by the limiting transformer neutral point, avoids overvoltage that transformer is caused damage.Whole device Installation and Debugging is good, and compact conformation, reasonable, and volume is little.Site operation just once is fixed to it on ground, connects with the neutral point of transformer to get final product, save time, laborsaving, and short construction period, workload is little, the construction area area is little.Gap electrical field is evenly distributed, and is dispersed little, the accuracy height.Maintenance workload is little.Because the utility model is structure as a whole, the electrode tip of discharging gap is made by titanium base platinum, can be for a long time in outdoor and not corrosion, and indeformable under electric shock is impacted, need not to change, maintenance workload is little.Discharging gap when sleety weather, can not cause discharging gap short circuit or clearance distance to shorten in horizontal direction, and its structural stability is good, is difficult for swinging at wind-force effect bottom electrode, and the possibility that causes clearance distance to change diminishes.Protectiveness is good, and isolating switch adopts and horizontally rotates 90 ° of foldings, and is easy to operate.Isolating switch separates with lightning arrester to be fixed, easy to identify, and after the damage, easy-to-search is easily changed.
Four, description of drawings
The utility model will be further described below in conjunction with accompanying drawing:
Fig. 1 is a front view of the present utility model;
Fig. 2 is a left view of the present utility model.
Five, embodiment
As depicted in figs. 1 and 2, present embodiment comprises isolating switch 4, lightning arrester 5, discharging gap 6, current transformer 7, JCQ1-10/600 series discharge counter 9 and support.Support comprises zinc-plated steel pole 11, channel-section steel support 8 and mounting bracket 12; Zinc-plated steel pole 11 is made by hollow steel pole is zinc-plated, is connected to upper and lower two winding floors 10,13 on it.Isolating switch 4, lightning arrester 5, discharging gap 6, outdoor dry type current transformer 7, discharge counter 9 are installed on the channel-section steel support 8, and channel-section steel support 8 is fixed on the zinc-plated steel pole 11.Isolating switch 4, lightning arrester 5 and discharging gap 6 parallel connections.
Two electrodes of discharging gap 6 are clavate, its termination is made by titanium base platinum, one of them electrode thread is installed in the upper end of lightning arrester 5, fix by locking nut and gear nut, another electrode thread is installed in the upper end of current transformer 7, fixed by locking nut and gear nut, by current transformer 7 ground connection, the discharging gap that two electrode tips form is " one " font.
Isolating switch 4 is made up of base 2, two insulation columns 14,15, current-carrying part and operating mechanisms 1.Two insulation columns 14,15 are installed on the base 2, and each insulation column 14 or 15 upper ends respectively are installed with the middle part that a contact position of conducting electricity plug-in strip 16, two plug-in strips 16 contacts is positioned at two insulation columns 14,15.Bearing holder (housing, cover) 3 respectively is equipped with in the lower end of insulation column 14,15, and the fixing rotating mechanism in insulation column 14,15 lower ends connects operating mechanism 1 by connecting rod 17.Operating mechanism 1 is a CJ6 type motor-operating mechanism, and it is fixed on zinc-plated steel pole 11 sidewalls by mounting bracket 12; Lightning arrester 5 is a porcelain overcoat zero-clearance zinc oxide lightning arrester, external JCQ1-10/600 series discharge counter 9.
During the thunderbolt overvoltage, lightning arrester 5 action earlier, before lightning arrester 5 damaged, discharging gap 6 was breakdown with lightning arrester 5 short circuits.For the long-time power frequency overvoltage that lightning arrester 5 can not bear, discharging gap 6 sustainable discharges with lightning arrester 5 short circuits, play a good protection to lightning arrester 5.
Claims (10)
1. transformer neutral point gap earth protective device, it comprises isolating switch (4), lightning arrester (5), discharging gap (6), current transformer (7) and support; It is characterized in that: isolating switch (4), lightning arrester (5), discharging gap (6) summation current transformer (7) are rack-mount; Isolating switch (4), lightning arrester (5) and discharging gap (6) parallel connection; Two electrodes of discharging gap (6) are clavate, and its termination is a hemisphere, are made by titanium base platinum, and at least one electrode is provided with the clearance distance adjusting mechanism; One of them electrode is installed in the upper end of lightning arrester (5), and another electrode is installed on the current transformer (7), and by current transformer (7) ground connection, the discharging gap that the termination of two electrode bars forms is " one " font.
2. transformer neutral point according to claim 1 gap earth protective device is characterized in that: described isolating switch (4) is made up of base (2), two insulation columns (14,15), current-carrying part and operating mechanism (1); Two insulation columns (14,15) are installed on the base (2), and each insulation column (14 or 15) upper end respectively is installed with a conduction plug-in strip (16), and the contact position of two plug-in strips (16) contact is positioned at the middle part of two insulation columns (14,15); Bearing holder (housing, cover) (3) respectively is equipped with in the lower end of insulation column (14,15), and the fixing rotating mechanism in insulation column (14,15) lower end connects operating mechanism (1) by connecting rod (17).
3. transformer neutral point according to claim 1 gap earth protective device is characterized in that: described isolating switch (4) is CS8-5 type manual-operating mechanism or CJ6 type motor-operating mechanism.
4. according to claim 1 or 2 or 3 described transformer neutral point gap earth protective devices, it is characterized in that: described lightning arrester (5) is a porcelain overcoat zero-clearance zinc oxide lightning arrester, is circumscribed with discharge counter (9).
5. transformer neutral point according to claim 4 gap earth protective device is characterized in that: described discharge counter (9) is JCQ1-10/600 series discharge counter.
6. according to claim 1 or 2 or 3 described transformer neutral point gap earth protective devices, it is characterized in that: described current transformer (7) is the outdoor dry type current transformer.
7. transformer neutral point according to claim 5 gap earth protective device is characterized in that: described support comprises zinc-plated steel pole (11), channel-section steel support (8) and mounting bracket (12); Zinc-plated steel pole (11) is made by hollow steel pole is zinc-plated, is connected to upper and lower two winding floors (10,13) on it.
8. transformer neutral point according to claim 6 gap earth protective device is characterized in that: described support comprises zinc-plated steel pole (11), channel-section steel support (8) and mounting bracket (12); Zinc-plated steel pole (11) is made by hollow steel pole is zinc-plated, is connected to upper and lower two winding floors (10,13) on it.
9. transformer neutral point according to claim 4 gap earth protective device is characterized in that: described support comprises zinc-plated steel pole (11), channel-section steel support (8) and mounting bracket (12); Zinc-plated steel pole (11) is made by hollow steel pole is zinc-plated, is connected to upper and lower two winding floors (10,13) on it.
10. according to claim 1 or 2 or 3 described transformer neutral point gap earth protective devices, it is characterized in that: described support comprises zinc-plated steel pole (11), channel-section steel support (8) and mounting bracket (12); Zinc-plated steel pole (11) is made by hollow steel pole is zinc-plated, is connected to upper and lower two winding floors (10,13) on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201038547U CN201541119U (en) | 2009-07-24 | 2009-07-24 | Transformer neutral point gap earth protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201038547U CN201541119U (en) | 2009-07-24 | 2009-07-24 | Transformer neutral point gap earth protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541119U true CN201541119U (en) | 2010-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201038547U Expired - Fee Related CN201541119U (en) | 2009-07-24 | 2009-07-24 | Transformer neutral point gap earth protective device |
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| CN (1) | CN201541119U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185279A (en) * | 2011-05-19 | 2011-09-14 | 重庆电力科学试验研究院 | Overvoltage protection device for neutral point of transformer |
| CN102684091A (en) * | 2012-05-25 | 2012-09-19 | 中水北方勘测设计研究有限责任公司 | Combined electrical device for large-sized transformer neutral point protection equipment |
| CN103532124A (en) * | 2013-07-02 | 2014-01-22 | 辽宁电力勘测设计院 | Main transformer neutral point CT arrangement system |
| CN104078849A (en) * | 2014-07-25 | 2014-10-01 | 国家电网公司 | Mounting bracket for lightning arrester |
| CN104868446A (en) * | 2015-06-04 | 2015-08-26 | 四川电力设计咨询有限责任公司 | Simplified-type neutral point integrated equipment |
| WO2016019641A1 (en) * | 2014-08-06 | 2016-02-11 | 齐进 | Main transformer neutral point overvoltage protection device |
| CN106505521A (en) * | 2016-11-28 | 2017-03-15 | 国家电网公司 | A kind of earthing or grounding means of transformer neutral point Integrated Protection System |
| CN107171265A (en) * | 2017-07-26 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of new energy cable connection-bridge frame |
| CN113066646A (en) * | 2021-03-09 | 2021-07-02 | 国网浙江省电力有限公司湖州供电公司 | 110kV transformer neutral point vacuum gap grounding complete equipment |
| CN113903619A (en) * | 2021-10-29 | 2022-01-07 | 广东电网有限责任公司 | Isolating switch device |
-
2009
- 2009-07-24 CN CN2009201038547U patent/CN201541119U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185279A (en) * | 2011-05-19 | 2011-09-14 | 重庆电力科学试验研究院 | Overvoltage protection device for neutral point of transformer |
| CN102684091A (en) * | 2012-05-25 | 2012-09-19 | 中水北方勘测设计研究有限责任公司 | Combined electrical device for large-sized transformer neutral point protection equipment |
| CN103532124A (en) * | 2013-07-02 | 2014-01-22 | 辽宁电力勘测设计院 | Main transformer neutral point CT arrangement system |
| CN104078849A (en) * | 2014-07-25 | 2014-10-01 | 国家电网公司 | Mounting bracket for lightning arrester |
| WO2016019641A1 (en) * | 2014-08-06 | 2016-02-11 | 齐进 | Main transformer neutral point overvoltage protection device |
| CN104868446A (en) * | 2015-06-04 | 2015-08-26 | 四川电力设计咨询有限责任公司 | Simplified-type neutral point integrated equipment |
| CN106505521A (en) * | 2016-11-28 | 2017-03-15 | 国家电网公司 | A kind of earthing or grounding means of transformer neutral point Integrated Protection System |
| CN107171265A (en) * | 2017-07-26 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of new energy cable connection-bridge frame |
| CN113066646A (en) * | 2021-03-09 | 2021-07-02 | 国网浙江省电力有限公司湖州供电公司 | 110kV transformer neutral point vacuum gap grounding complete equipment |
| CN113066646B (en) * | 2021-03-09 | 2023-09-29 | 国网浙江省电力有限公司湖州供电公司 | Vacuum gap grounding complete equipment for neutral point of 110kV transformer |
| CN113903619A (en) * | 2021-10-29 | 2022-01-07 | 广东电网有限责任公司 | Isolating switch device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20130724 |